One-to-Two Wireless Lavalier Microphone UK-Ai220L

Product Features:

1. Adopts UHF ultra-high frequency band, featuring less interference and more reliable transmission compared with traditional VHF band. It supports two-channel signal reception with 100 selectable channels per channel and IR infrared automatic frequency matching function; suitable for various meetings and speech scenarios.

2. Each channel is equipped with independent electronic volume adjustment with 31-level volume control. Signals are transmitted over the UHF band in 250KHz steps, and frequency matching is realized via infrared.

3. Supports lock screen function operated through function combination keys. Audio and data adopt dedicated pilot signals and ID codes to effectively prevent crosstalk and interference.

4. One-touch frequency scanning function is available to intelligently search for interference-free frequencies. Each channel features antenna diversity function with automatic indication of current antenna status for stronger anti-interference capability.

5. Signals are transmitted over the UHF band within the frequency range of 640-690MHz. The LCD screen displays working channel, operating frequency point, received signal and audio signal.

6. Two rubber receiving antennas are installed on the rear of the receiver to boost signal reception with an elegant appearance.

▲7. The rear panel is provided with 2 balanced outputs, 1 mixed unbalanced output and 1 mixed balanced output, compatible with various external devices.

▲8. Built-in AI voice control: supports control of power supply, lighting, LED screen power, video switching and volume, as well as doorway conference status light signs, with voice audio feedback.

▲9. Supports voice control via lavalier microphones and external omnidirectional microphones, anti-false wakeup function, and 1-channel monitoring output.

▲10. Equipped with 1 power sequencer control port, 1 lighting control port, 1 conference light sign control port, 1 LED screen control port, 2 RS-232 ports for volume control and video switching, 1 set of voice feedback monitoring and 1 line input. Example wake word: Conference Assistant. Feedback prompt: I’m here, please speak. Volume up: the volume increases in 1dB steps.

▲12. Built-in 3W cavity speaker, which can be turned on and off via voice control.

13. Synchronous display of frequency and channel. Both receiver and transmitter show battery status. Low battery reminder is available, and mute is activated when power runs out to avoid noise caused by power failure during operation.

14. Microphone power consumption: 80mA, powered by two 1.5V batteries, supporting continuous operation for more than 6 hours.

15. Operating distance: 60 meters

Receiver Parameters

Oscillation Mode: Phase-locked loop frequency synthesis

Frequency Range: UHF 640-690MHz (UHF 624.2MHz-673.95MHz; CH1: 624.2---648.95MHz, CH2: 649.2—673.95MHz)

Frequency Stability: ±0.001%

Modulation Mode: FM

Signal-to-Noise Ratio: >105dB

Distortion: <0.5%@1KHz

Frequency Response: 65Hz～18KHz ± 3dB

Sensitivity: 1.2μV @S/N=5dBμV

Power Supply: DC 12V～17V

Audio Output: Independent: 0～400mV; Mixed: 0～300mV

Transmitter Parameters

Power Supply: DC 3V (2 × 1.5V AA batteries)

Microphone Power Consumption: 100mA

Carrier Frequency: UHF 640-690MHz

Frequency Stability: ±0.001%

Maximum Frequency Deviation: ±30KHz

Signal-to-Noise Ratio: >60dB

Adjacent Channel Rejection Ratio: >80dB

Dynamic Range: ≥100dB

Type: Condenser

Polar Pattern: Unidirectional

Frequency Response: 40Hz～20KHz

Microphone Sensitivity: -43±3dB@1KHz

Transmission Power: 8mW(LO)/13mW(HI)